Members of the People’s Movement for a Just Society (P-move) gathered at Public Sector Development Commission Office opposite Government House on Thursday morning.

They alleged police planted the drugs in an effort to prevent P-move from gathering in Bangkok on Thursday to call on the government to respond to their myriad problems.

In a statement, the group said the alleged frame attempt was a serious crime against an innocent people.

It asked the PM to set up a joint committee consisting of authorities and the public to investigate and punish the officers.

It was reported on Wednesday that four plainclothes policemen dropped the amphetamine pills bag at P-move’s office in Trang and accused its members of drug possession, but the activists spotted the bag first and took picture evidence.